Question

Condit 11. The doctor orders 25 mg PO daily in 3 divided doses of methylphenidate for Mr. Turner. He is to take the drug 30-45 minutes before meals. How many milliliters will the patient receive per dose? Usual Dosage: See package inset Breckenridge Pharmaceutical, Inc. Esch mier contans Methyohendate Hycrcchionde USP 2 mg NDC 51991-713-50 12-53 X Storage Stre at 20 to 25 C (ce to 77F) Isee USP Cortroled Room Tempesnture Manufactured by T Phm n Manmouth Jarcion, N 02 Dspanse in ight cortainer wih chid-esistant closure Drc by Bedkedge Pharmacea Bocs Reton FL 33487 Methylphenidate Hydrochloride Oral Solution 4.2 mlx Warning: Keep this and all medications out of the reach of chikden Rer 00 4/10 DO NOT ACCEPT IF THE NECK BAND PRINTED WITH SEALED FOR YOUR PROTECTION IS BROKEN OR MISSING 10 mg per 5 mL 51991 71350 Rx Only PHARMACIST: Dispense the accompanying Medication Guide to each patient. Lot 2367BC Exp 12/2025 500 mL

Answer 1

ANSWER.

* Calculation of amount(ml) of drug received by the patient per dose.

         Formula = Desired dose/Dose in hand * Quantity.

     Here

           Desired dose (D) = 25 mg (3 divided doses).

           Dose in hand (H) = 10 mg.

                 Quantity (Q) = 5 ml.

   As per above formula

       Amount(ml) of drug required daily = D/H * Q

                                                             = 25/10 * 5

                                                             = 12.5 ml (3 divided doses).

Amount(ml) of drug received by the patient per dose = 12.5 / 3

                                                                                = 4.17 ml.